0:00:00.000,0:00:03.179 English captions by Jade Cheng from the University of Michigan 0:00:03.179,0:00:08.001 In a prone position, Achilles tendon stability[br]can be assessed using Thompson's test. 0:00:08.001,0:00:12.009 Flex the knee to ninety degrees, squeeze the[br]calf, and observe for plantarflexion of the 0:00:12.009,0:00:13.309 foot. 0:00:13.309,9:59:59.000 Absence of plantarflexion indicates Achilles[br]tendon rupture.